Dyfyniad APA

Goel, P. K. (1997). Water pollution: : causes, effects and control. New age international publishers.

Dyfyniad Arddull Chicago

Goel, P. K. Water Pollution: : Causes, Effects and Control. New Delhi: New age international publishers, 1997.

Dyfyniad MLA

Goel, P. K. Water Pollution: : Causes, Effects and Control. New age international publishers, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.